.my-mess {
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
    padding: 5px 15px;
    color: #FFF;
    margin: 3px 0;
}

.login {
    background-color: #5CB85C;
}

.say {
    background-color: #5BC0DE;
}

.logout {
    background-color: #F0AD4E;
}

.signUp {
    background-color: #D9534F;
}

#car {
    margin-top: 180px;
    margin-left: -20px;
    opacity: 0;
    width: 55px;
    height: 40px;
    z-index: 999;
    position: absolute;
}

#qiu {
    border-radius: 50%;
    width: 20px;
    height: 20px;
    background-color: #FF6B22;
    margin-top: 100px;
    z-index: 999;
    position: absolute;
}